Stop-motion for knitting-machines.



F. CRAWFORD, SR. STOP MOTION FOR KNITTING MACHINES.

APPLICATWN FILED NOV, 25, WW.

Patented July 16, 1918.

fwfi 7? 55 Z16 W5? earns FRANK'eRAWEo'nn'sE, on NEW BRUNSWICK. NEW JERSEY. ASSIGNOR TO THE CRAW- ron'i) MANUFACTURING COMPANY, OF NEW BRUNSWICK, JERSEY, ACOR'PO- RATION OFN'EW JERSEY.

STOP-MOTION son KNITTING-MACHINES.

-Applicationfiled November 25, 1916.

T0 aZZ whom it may concern I Be it known that :1, F RANK CRAWFORD, Sn,

a citizen of the United States and a residentof ew Brunswick, county of hdiddlesex, State of New J ersey,-haveinvented certain Improvements in Stop-Motions for Khitting-Machines, of which the following is a specification.

.My invention relates to certain improvements in the stop motion for which Letters Patent were granted to me on the 16th day of January, 1917, No. 1,212,912.

The object of my present invention is to improve the construction of the trip levers which are held in position by the thread so that, when the thread breaks and a trip lever falls to release the stop motion mechanism, movement of said mechanism will re-set the lever so that it can be threaded, obviating the necessity of the operator lifting the lever to the position to be threaded.

In the accompanying drawing Figure 1, is a side view of sufficient of the stop motion mechanism, shown partly in section, to illustrate my invention;

Fig. 2, is a sectional plan view on the line 22, Fig. 1;

Fig. 3, is a side view showing the lever in position after the thread has been broken;

Fig. 4:, is a side view showing the lever being raised by the mechanism so that it will be in position for re-threading; and

Fig. 5, is a perspective view of the lever.

Referring to the drawing, 1 is the casing of a stop motion, such as illustrated in the above named application, and mounted on posts 2 projecting from the outside of this casing is a series of trip levers 3 pivoted so as to swing freely.

Projecting from the casing is a series of pairs of guides 4 between which the hooked end 5 of the lever extends, as clearly shown in Fig. 1, so that a thread can be inserted in the space between the hooks, and the guides will hold the lever in its raised posi tion until a break occurs in the thread, when the lever will drop by its'own weight to the position illustrated in Fig. 3. The movement of the lever is limited by a stop pin 6, which comes in contact with shoulders on the said lever. Within the casing 1 is a disk 7 which has a pin arranged to engage the main lever mechanism of the stop motion which shifts the device for stopping Specification of Letters Patent.

the machine. these drawingsyas it is fully described and Patented July 16, 1918.

Serial No. 133,348.

This is not shown in detail in illustrated in the above mentioned. patent.

On the disk '7 are depending portions 8 which are engaged by an arm 9 on a ver'tlcal shaft 10. A spring 11 connects this shaft with a fixture and tends to move the arm in the direction of the arrow, Fig. 2. On the lower portion of the shaft 10 is an arm 12 having a roller 13, which is held in position by a flat portion 1 1 forming an integral part of the trip lever 3, in the present instance beyond the pivot, so that when the lever is in its raised position the portion 1 1 will prevent the movement of the arm 12, preventing the spring 11 from moving the shaft 10 and the disk 7 in the direction of the arrow, Fig. 2, but as soon as a thread breaks and the trip lever falls the flat portion 14 is raised clear ofthe arm 12 and its roller 13, as shown in Fig. 3, and releases the arm so that the spring 11 will turn the shaft 10 and the disk 7 in the direction of its arrow, Fig. 2, causing it to actuate the stop mechanism. This is fully set forth and described in the patent hereinbefore alluded to.

In the construction shown in the above mentioned application, the trip lever, after dropping, due to the breakage of a thread, had to be raised by hand and held in the raised position while the thread was re-inserted in the hook.

I find that this is rather difficult to accomplish as the operator, in many cases, has to use both hands in manipulating the thread. I, therefore, provide means by which the trip lever is returned to its normal position. Fig. 1, immediately after the breaking o the thread and the tripping of the stop mechanism. This is accomplished by extending a plate 15 at the back of the trip lever 3 and sufficiently below the pivot of the lever so that it will be in line with the arm 12 and its roller 13 as they move to the forward position, as shown in Fig. 41 and as fully set forth in the above mentioned patent; the portion 14; being raised sufficiently so as not to interfere with the movement of theroller. As soon as the roller strikes the plate 15 it will lift the trip lever from the position shown in Fig. 41 tothat shown in Fig. 1, and the moment this is done the flat portion 1 1 is moved back of the roller 13,

a shaft having arms; a sprino the shaft when a thread brealzs; a pivoted as illustrated in Figs. 1 and 2, and prevents the return of the arm 12 and holds the shaft against the pressure of the spring 11, the hook 5 of the lever being threaded in the meantime by the operator so that the lever trip lever arranged to be held in its raised position by the thread and having tWo surfaces beyond the pivot, one for holding an arm of the shaft when the lever is held in the raised position by the thread the other Copies of this patent may be obtained for being located in the path of the arm when it is returned after actuating the trip mechanism, so as to automatically raise the trip lever into its normal position for threading.

2. The combination in a stop motion for knitting machines, of a casing; an arm projecting from the casing and connected to the stop mechanism; a trip lever pivoted to the casing and having two surfaces at one side of the pivot; means for engaging the thread on the opposite side of the pivot, one of said surfaces retaining the arm in its normal position, the other being in the path of the arm when the lever is released by the thread so that the lever Will be returned to its normal position by the arm.

FRANK CRAWFORD, SENIOR.

five cents each, by addressing the "Commissioner of Patents, Washington, D. G. r 

